An interface is a shared boundary between two systems. It can be a hardware interface, like the one between a computer and a printer, or a software interface, like the one between a word processor and a spell checker.
In the publishing world, an interface is the shared boundary between the book and the reader. The purpose of the interface is to allow the reader to interact with the book in a way that is comfortable and natural for them.
The interface between a book and a reader is largely determined by the format of the book. For example, a paperback book has a different interface than an ebook. The interface of a book also includes the design of the cover, the layout of the pages, and the typeface used for the text.
An interface is a shared boundary between two systems. It is a point of interaction or communication. In computing, an interface is a shared boundary between two programs or between a program and a user. An interface can be graphical, such as a graphical user interface (GUI), or it can be text-based, such as a command-line interface (CLI).
A book interface is the shared boundary between a reader and a book. The book interface is the physical book itself, the cover, the spine, the pages, and the words. The book interface is also the mental model that the reader has of the book. The mental model includes the reader’s expectations, assumptions, and understanding of the book.
The importance of Interface as it pertains to books is that it allows the reader to connect with the characters and story. Interface allows the reader to see the world through the eyes of the characters and to feel their emotions. It is the key to creating an immersive reading experience.